Improvement in converting reciprocating into rotary motion



C. CHADWICK.

couvzmme mcxrnocuma INTO ROTARY MOTION.

No. 191,654. Patented June 5,1377.

FIE-L1.

AT TEST NPETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D Cv sents a lever.

UNITED STATES PATENT OFFICE.

CHARLES OHADWIOK, OF HANNIBAL, MISSOURL ASSIGNOR OF ONE-HALF HIS RIGHTTO PETER B. GROAT, OF SAME PLACE.

IMPROVEMENT IN CONVERTING RECIPROCATING INTO ROTARY MOTION.

Specification forming part of Letters Patent N 0. 191,654, dated June 5,1877; application filed March 19, 1877.

To all whom it may concern Be it known that I, CHARLES UHADWIGK, ofHannibal, Missouri, have made a new and useful Improvement in ConvertingReciprocating into Rotary Motion, of which the following is a full.clear, and exact description, reference being had to the annexeddrawing, making part of this specification, in which Figure 1 is a sideelevation of a device em bodying the improvement; Fig. 2, a plan of thesame; Fig. 3, a side view of the casing surrounding the shaft to whichthe rotary movement is imparted, the side of the casing being removed toshow the interior mechan mm; and Fig. 4 a cross-section of the partsshown in Fig. 3.

Similar letters denote similar parts.

Referring to the drawing, A represents a frame having the uprights a, inwhich is journaled a shaft, B, and being the shaft exhibiting thedesired rotary movement. 0 repre- It is pivoted to the frame at c, andis arranged suitably to obtain a recipro eating movement; D represents apeculiarlyshaped construction (for convenience termed a spider) that iskeyed to the shaft B and turns with it. It is of the shape shown inFigs. 3 and 4, having a center, d, that, in its general outline, issquare, and arms (1, one or more, standing out from the center,substantially as shown.

The spider D is inclosed in casings E E that turn loosely upon the shaftB and around the spider, saving as hereinafter described. The casing andspider have such relative shape as to inclose between the periphery ofthe spider and the rim of the casing a tapering space, F, (or spacesaccording to the number of arms d,) that is larger toward the face (1 ofthe arm d and smaller toward the back of the succeeding arm.

end of the space F, and another cord, H, extends from the other end 0 ofthe lever similarly to and around the other casing E.

The operation is as follows: Let the end 0 of the lever be depressedso-as to draw the cord H, and, from being connected with the casing E,to turn the latter partly around. In turning, the casing comes incontact with the wedges G and draws them away from the faces (1 of thearms d and into the position occupied by the wedges in the other clutch,where they operate, by coming in contact with both the spider and thecasing, to bind these two parts together, and, in consequence, to rotatethe spider, and with it the shaft B. The latter continues to rotateuntil the downward movement of the end 0 of the lever ceases. The otherend cf of the lever now being depressed in turn, the rotation of theshaft is maintained, through the action of the cord H upon the casing Eand spider therein, and the movement made continuous. It is necessary,however, as each end of the lever is elevated, to reinstate the casingsand cords in their original positions, respectively. To this end thefollowing mechanism is employed: Cords l I are attached at one end tothe casings E E, respectively, and wound around the same in the oppositedirection to that of the cords H H, and at the other end are connectedwith springs J J, respectively, that are arranged to produce a tensionupon them. Now, as soon as the strain upon either cord H or H isrelieved, the springs J J alternately operate to turn the casings E andE back upon the shaft B, and, in turning the casings, to wind the cordsH and H again upon them. As the casings turn back the wedges arerelieved and allowed to fall back into their original positions againstthe faces d, where they cease to bind the casing and spider togetheruntil again drawn forward.

The cords I and I are, preferably, wound around a smaller portion orhub, e c, of the casing. Springs K are inserted in the faces of the armsd to facilitate the action of the wedges. L represents the fly-wheel.

Several advantages accrue from the abovedescribed construction. Thedifficulty arising from the dead-center of a crank is entirely obviated.The rotary movement of the shaft can be initiated whatever position thelever is in, and can be maintained however short or long the stroke ofthe lever may be. The movement is practically noiseless, and the workingparts of the machine are favorable to durability.

It is apparent that, so far as wedging the spider and casing together isconcerned, the result can be equally as well attained by making thespider round and the inner side of the rim of the casin g irregular, andof such a shape as to inclose between the spider and rim a space orseries of spaces of a tapering form for the wedge or wedges to fallinto.

I claim- The combination of the shaft B, lever O, spider D, casings E E,rollers G, cords H H I 1, and springs J J, substantially as described.

OHAS. OHADWIOK.

Witnesses:

I. A. JOHNSON, B. H. KNIGHTON.

